Despite an impressive 16-0 professional record, Russia’s Khabib Nurmagomedov entered the Octagon for his UFC debut in January with little fanfare. But then the fists started flying, and by the third round, he had submitted Kamal Shalorus and improved to 17-0. Tonight “The Eagle” will get an even stiffer test in Brazilian powerhouse Gleison Tibau, who has pounded his way into the ranks of contenders at 155 pounds with his defeats of Kurt Pellegrino, Rafaello Oliveira, and Rafael dos Anjos.

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